/// The WTSQuerySessionInformation function retrieves session information for the specified

/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/termserv/termserv/wtsquerysessioninformation.asp

public static extern bool WTSQuerySessionInformation(

    Private Declare Auto Function WTSQuerySessionInformation Lib "wtsapi32.dll" ( _

    private static extern bool WTSQuerySessionInformation(IntPtr hServer, int sessionId, WTS_INFO_CLASS wtsInfoClass, out IntPtr ppBuffer, out int pBytesReturned);

        if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WTS_INFO_CLASS.WTSUserName, out buffer, out strLen) && strLen > 1)

        if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WTS_INFO_CLASS.WTSDomainName, out buffer, out strLen) && strLen > 1)

    /// The WTSQuerySessionInformation function retrieves session information for the specified

    /// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/termserv/termserv/wtsquerysessioninformation.asp

            public static extern bool WTSQuerySessionInformation(

                    bool sessionInfo = WTSQuerySessionInformation( System.IntPtr.Zero, WTS_CURRENT_SESSION, WTSInfoClass.WTSSessionId, out buffer, out bytesReturned );

/// Contains values that indicate the type of session information to retrieve in a call to the <see cref="WTSQuerySessionInformation"/> function.

     /// <see cref="WTSQuerySessionInformation"/> will always return a value of 0.

See WTSQuerySessionInformation